SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                ----------------

                                 SCHEDULE 13G/A
                                ----------------

                                 Amendment No. 3


             INFORMATION STATEMENT PURSUANT TO RULES 13d-1 AND 13d-2
                    UNDER THE SECURITIES EXCHANGE ACT OF 1934

                                   Tronox Inc.
                                (NAME OF ISSUER)

                          Common Stock, $0.01 par value
                         (TITLE OF CLASS OF SECURITIES)

                                    897051108
                                 (CUSIP NUMBER)

                                December 31, 2008
             (Date of Event which requires Filing of this Statement)

                 Check the appropriate box to designate the rule
                    pursuant to which this Schedule is filed:

                                [ ] Rule 13d-1(b)
                                [x] Rule 13d-1(c)
                                [ ] Rule 13d-1(d)






                             (Page 1 of 17 Pages)
------------------

* The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

     The information required in the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act (however, see
the Notes).





CUSIP No. 897051108                 13G/A                     PAGE 2 of 17 PAGES

--------------------------------------------------------------------------------
     (1)  NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO.
          OF ABOVE PERSON
          Ardsley Partners Fund II, L.P.
--------------------------------------------------------------------------------
     (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                    (a)  [x]
                                                                    (b)  [ ]
--------------------------------------------------------------------------------
     (3)  SEC USE ONLY

--------------------------------------------------------------------------------
    (4)   CITIZENSHIP OR PLACE OF ORGANIZATION
          Delaware
--------------------------------------------------------------------------------

NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES         _________________________________________________________________

BENEFICIALLY   (6)  SHARED VOTING POWER
                    0
OWNED BY       _________________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      _________________________________________________________________

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    0
--------------------------------------------------------------------------------
     (9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
          BY EACH REPORTING PERSON
          0
--------------------------------------------------------------------------------
    (10)  CHECK BOX IF THE AGGREGATE AMOUNT
          IN ROW (9) EXCLUDES CERTAIN SHARES **                          [ ]
--------------------------------------------------------------------------------
    (11)  PERCENT OF CLASS REPRESENTED
          BY AMOUNT IN ROW (9)
          0%
--------------------------------------------------------------------------------
    (12)  TYPE OF REPORTING PERSON **
          PN
--------------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!




CUSIP No. 897051108                 13G/A                     PAGE 3 of 17 PAGES

--------------------------------------------------------------------------------
     (1)  NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO.
          OF ABOVE PERSON
          Ardsley Partners Institutional Fund, L.P.
--------------------------------------------------------------------------------
     (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                    (a)  [x]
                                                                    (b)  [ ]
--------------------------------------------------------------------------------
     (3)  SEC USE ONLY

--------------------------------------------------------------------------------
     (4)  CITIZENSHIP OR PLACE OF ORGANIZATION
          Delaware
--------------------------------------------------------------------------------

NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES         _________________________________________________________________

BENEFICIALLY   (6)  SHARED VOTING POWER
                    0
OWNED BY       _________________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      _________________________________________________________________

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    0
--------------------------------------------------------------------------------
     (9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
          BY EACH REPORTING PERSON
          0
--------------------------------------------------------------------------------
    (10)  CHECK BOX IF THE AGGREGATE AMOUNT
          IN ROW (9) EXCLUDES CERTAIN SHARES **                          [ ]
--------------------------------------------------------------------------------
    (11)  PERCENT OF CLASS REPRESENTED
          BY AMOUNT IN ROW (9)
          0%
--------------------------------------------------------------------------------
    (12)  TYPE OF REPORTING PERSON **
          PN
--------------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 897051108                 13G/A                     PAGE 4 of 17 PAGES

--------------------------------------------------------------------------------
     (1)  NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO.
          OF ABOVE PERSON
          Ardsley Renewable Energy Offshore Fund, Ltd.
--------------------------------------------------------------------------------
     (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                    (a)  [x]
                                                                    (b)  [ ]
--------------------------------------------------------------------------------
     (3)  SEC USE ONLY

--------------------------------------------------------------------------------
     (4)  CITIZENSHIP OR PLACE OF ORGANIZATION
          British Virgin Islands
--------------------------------------------------------------------------------

NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES         _________________________________________________________________

BENEFICIALLY   (6)  SHARED VOTING POWER
                    0
OWNED BY       _________________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      _________________________________________________________________

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    0
--------------------------------------------------------------------------------
     (9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
          BY EACH REPORTING PERSON
          0
--------------------------------------------------------------------------------
    (10)  CHECK BOX IF THE AGGREGATE AMOUNT
          IN ROW (9) EXCLUDES CERTAIN SHARES **                          [ ]
--------------------------------------------------------------------------------
    (11)  PERCENT OF CLASS REPRESENTED
          BY AMOUNT IN ROW (9)
          0%
--------------------------------------------------------------------------------
    (12)  TYPE OF REPORTING PERSON **
          CO
--------------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 897051108                 13G/A                     PAGE 5 of 17 PAGES

--------------------------------------------------------------------------------
     (1)  NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO.
          OF ABOVE PERSON
          Ardsley Offshore Fund Ltd.
--------------------------------------------------------------------------------
     (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                    (a)  [x]
                                                                    (b)  [ ]
--------------------------------------------------------------------------------
     (3)  SEC USE ONLY

--------------------------------------------------------------------------------
     (4)  CITIZENSHIP OR PLACE OF ORGANIZATION
          British Virgin Islands
--------------------------------------------------------------------------------

NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES         _________________________________________________________________

BENEFICIALLY   (6)  SHARED VOTING POWER
                    0
OWNED BY       _________________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      _________________________________________________________________

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    0
--------------------------------------------------------------------------------
     (9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
          BY EACH REPORTING PERSON
          0
--------------------------------------------------------------------------------
    (10)  CHECK BOX IF THE AGGREGATE AMOUNT
          IN ROW (9) EXCLUDES CERTAIN SHARES **                          [ ]
--------------------------------------------------------------------------------
    (11)  PERCENT OF CLASS REPRESENTED
          BY AMOUNT IN ROW (9)
          0%
--------------------------------------------------------------------------------
    (12)  TYPE OF REPORTING PERSON **
          CO
--------------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 897051108                 13G/A                     PAGE 6 of 17 PAGES

--------------------------------------------------------------------------------
     (1)  NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO.
          OF ABOVE PERSON
          Ardsley Advisory Partners
--------------------------------------------------------------------------------
     (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                    (a)  [x]
                                                                    (b)  [ ]
--------------------------------------------------------------------------------
     (3)  SEC USE ONLY

--------------------------------------------------------------------------------
     (4)  CITIZENSHIP OR PLACE OF ORGANIZATION
          Connecticut
--------------------------------------------------------------------------------

NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES         _________________________________________________________________

BENEFICIALLY   (6)  SHARED VOTING POWER
                    0
OWNED BY       _________________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      _________________________________________________________________

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    0
--------------------------------------------------------------------------------
     (9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
          BY EACH REPORTING PERSON
          0
--------------------------------------------------------------------------------
    (10)  CHECK BOX IF THE AGGREGATE AMOUNT
          IN ROW (9) EXCLUDES CERTAIN SHARES **                          [ ]
--------------------------------------------------------------------------------
    (11)  PERCENT OF CLASS REPRESENTED
          BY AMOUNT IN ROW (9)
          0%
--------------------------------------------------------------------------------
    (12)  TYPE OF REPORTING PERSON **
          PN; IA
--------------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 897051108                 13G/A                     PAGE 7 of 17 PAGES

--------------------------------------------------------------------------------
     (1)  NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO.
          OF ABOVE PERSON
          Ardsley Partners I
--------------------------------------------------------------------------------
     (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                    (a)  [x]
                                                                    (b)  [ ]
--------------------------------------------------------------------------------
     (3)  SEC USE ONLY

--------------------------------------------------------------------------------
     (4)  CITIZENSHIP OR PLACE OF ORGANIZATION
          Connecticut
--------------------------------------------------------------------------------

NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES         _________________________________________________________________

BENEFICIALLY   (6)  SHARED VOTING POWER
                    0
OWNED BY       _________________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      _________________________________________________________________

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    0
--------------------------------------------------------------------------------
     (9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
          BY EACH REPORTING PERSON
          0
--------------------------------------------------------------------------------
    (10)  CHECK BOX IF THE AGGREGATE AMOUNT
          IN ROW (9) EXCLUDES CERTAIN SHARES **                          [ ]
--------------------------------------------------------------------------------
    (11)  PERCENT OF CLASS REPRESENTED
          BY AMOUNT IN ROW (9)
          0%
--------------------------------------------------------------------------------
    (12)  TYPE OF REPORTING PERSON **
          PN
--------------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 897051108                  13G/A                    PAGE 8 of 17 PAGES

--------------------------------------------------------------------------------
     (1)  NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO.
          OF ABOVE PERSON
          Philip J. Hempleman
--------------------------------------------------------------------------------
     (2)  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                    (a)  [x]
                                                                    (b)  [ ]
--------------------------------------------------------------------------------
     (3)  SEC USE ONLY

--------------------------------------------------------------------------------
     (4)  CITIZENSHIP OR PLACE OF ORGANIZATION
          United States
--------------------------------------------------------------------------------

NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES         _________________________________________________________________

BENEFICIALLY   (6)  SHARED VOTING POWER
                    1,170,000
OWNED BY       _________________________________________________________________

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      _________________________________________________________________

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    1,170,000
--------------------------------------------------------------------------------
     (9)  AGGREGATE AMOUNT BENEFICIALLY OWNED
          BY EACH REPORTING PERSON
          1,170,000
--------------------------------------------------------------------------------
    (10)  CHECK BOX IF THE AGGREGATE AMOUNT
          IN ROW (9) EXCLUDES CERTAIN SHARES **                          [ ]
--------------------------------------------------------------------------------
    (11)  PERCENT OF CLASS REPRESENTED
          BY AMOUNT IN ROW (9)
          6.31%
--------------------------------------------------------------------------------
    (12)  TYPE OF REPORTING PERSON **
          IN
--------------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 897051108                  13G/A                    PAGE 9 of 17 PAGES

ITEM 1(a).  NAME OF ISSUER:
                  The name of the issuer is Tronox Inc. (the "Company").

ITEM 1(b).  ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
                  123 Robert S. Kerr Avenue, Oklahoma City, Oklahoma 73102

ITEM 2(a).  NAME OF PERSON FILING:

         This statement is filed by:

         (i)      Ardsley Partners Fund II, L.P., a Delaware limited partnership
                  ("AP II"), with respect to the shares of Class A Common Stock,
                  par value $0.01 per share ("Common Stock") directly owned by
                  it;
         (ii)     Ardsley Partners Institutional Fund, L.P., a Delaware limited
                  partnership ("Ardsley Institutional"), with respect to the
                  shares of Common Stock directly owned by it;
         (iii)    Ardsley Renewable Energy Offshore Fund, Ltd., a British Virgin
                  Islands corporation ("Ardsley Energy"), with respect to the
                  shares of Common Stock directly owned by it;
         (iii)    Ardsley Offshore Fund Ltd., a British Virgin Islands
                  corporation ("Ardsley Offshore"), with respect to the shares
                  of Common Stock directly owned by it;
         (iv)     Ardsley Advisory Partners, a New York general partnership
                  ("Ardsley") which serves as Investment Manager of Ardsley
                  Offshore and the Investment Adviser of AP II, Ardsley
                  Institutional, Ardsley Energy and certain managed accounts,
                  with respect to the shares of Common Stock directly owned by
                  Ardsley Offshore, AP II, Ardsley Institutional, Ardsley Energy
                  and the managed accounts;
         (v)      Ardsley Partners I, a New York general partnership ("Ardsley
                  Partners") which serves as General Partner of AP II and
                  Ardsley Institutional; and
         (vi)     Philip J. Hempleman ("Mr. Hempleman"), the Managing Partner of
                  Ardsley and Ardsley Partners, with respect to the shares of
                  Common Stock owned by AP II, Ardsley Institutional, Ardsley
                  Energy, Ardsley Offshore and the managed accounts and with
                  respect to the shares of Common Stock he owns individually.

                  The foregoing persons are hereinafter sometimes collectively
referred to as the "Reporting Persons." Any disclosures herein with respect to
persons other than the Reporting Persons are made on information and belief
after making inquiry to the appropriate party.

ITEM 2(b).  ADDRESS OF PRINCIPAL OFFICE OR, IF NONE, RESIDENCE:

         The address of the business office of each of the Reporting Persons,
with the exception of Ardsley Offshore and Ardsley Energy, is 262 Harbor Drive,
Stamford, Connecticut 06902.

         The address of the registered office of Ardsley Offshore and Ardsley
Energy is Romasco Place, Wickhams Cay 1, Roadtown Tortola, British Virgin
Islands.

ITEM 2(c).  CITIZENSHIP:

         AP II and Ardsley Institutional are Delaware limited partnerships.
Ardsley Offshore and Ardsley Energy are British Virgin Islands corporations.
Ardsley and Ardsley Partners are New York general partnerships. Mr. Hempleman is
a United States Citizen.




CUSIP No. 897051108                  13G/A                   PAGE 10 of 17 PAGES

ITEM 2(d).  TITLE OF CLASS OF SECURITIES: Common Stock, par value $0.01 per
            share

ITEM 2(e).  CUSIP NUMBER:  897051108

ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULES 13d-1(b), OR 13d-2(b),
CHECK WHETHER THE PERSON FILING IS A:

          (a)[ ] Broker or dealer registered under Section 15 of the Act

          (b)[ ] Bank as defined in Section 3(a)(6) of the Act


          (c)[ ] Insurance Company as defined in Section 3(a)(19) of the Act

          (d)[ ] Investment Company registered under Section 8 of the Investment
                 Company Act

          (e)[ ] Investment Adviser registered under Section 203 of the
                 Investment Advisers Act of 1940

          (f)[ ] Employee Benefit Plan, Pension Fund which is subject to the
                 provisions of the Employee Retirement Income Security Act of
                 1974 or Endowment Fund; see Rule 13d-1(b)(1)(ii)(F)

          (g)[ ] Parent Holding Company, in accordance with Rule
                 13d-1(b)(ii)(G); see item 7

          (h)[ ] Group, in accordance with Rule 13d-1(b)(1)(ii)(H)

If this statement is filed pursuant to Rule 13d-1(c), check the box. [X]





CUSIP No. 897051108                 13G/A                    PAGE 11 of 17 PAGES

ITEM 4.   OWNERSHIP.

         A.    Ardsley Partners Fund II, L.P.
                  (a)  Amount beneficially owned: -0-
                  (b)  Percent of class: 0%. (The percentages used herein
                       and in the rest of Item 4 are calculated based upon
                       the 18,556,127 shares of Common Stock, issued and
                       outstanding as of October 31, 2008 as per the
                       Company's Form 10-Q, as filed on November 7, 2008.)
                 (c)  (i) Sole Power to vote or direct the vote: -0-
                     (ii) Shared power to vote or direct the vote: -0-
                    (iii) Sole power to dispose or direct the disposition: -0-
                     (iv) Shared power to dispose or direct the disposition: -0-

         B.   Ardsley Partners Institutional Fund, L.P.
                  (a) Amount beneficially owned: -0-
                  (b) Percent of class: 0%
                  (c) (i) Sole Power to vote or direct the vote: -0-
                     (ii) Shared power to vote or direct the vote: -0-
                    (iii) Sole power to dispose or direct the disposition: -0-
                     (iv) Shared power to dispose or direct the disposition: -0-

         C.   Ardsley Renewable Energy Offshore Fund, Ltd.
                  (a) Amount beneficially owned: -0-
                  (b) Percent of class: 0%
                  (c) (i) Sole Power to vote or direct the vote: -0-
                     (ii) Shared power to vote or direct the vote: -0-
                    (iii) Sole power to dispose or direct the disposition: -0-
                     (iv) Shared power to dispose or direct the disposition: -0-

         D.   Ardsley Offshore Fund Ltd.
                  (a) Amount beneficially owned: -0-
                  (b) Percent of class: 0%
                  (c) (i) Sole Power to vote or direct the vote: -0-
                     (ii) Shared power to vote or direct the vote: -0-
                    (iii) Sole power to dispose or direct the disposition: -0-
                     (iv) Shared power to dispose or direct the disposition: -0-

         E.   Ardsley Advisory Partners
                  (a) Amount beneficially owned: -0-
                  (b) Percent of class: 0%
                  (c) (i) Sole Power to vote or direct the vote: -0-
                     (ii) Shared power to vote or direct the vote: -0-
                    (iii) Sole power to dispose or direct the disposition: -0-
                     (iv) Shared power to dispose or direct the disposition: -0-

         F.   Ardsley Partners I
                  (a) Amount beneficially owned: -0-
                  (b) Percent of class: 0%
                  (c) (i) Sole Power to vote or direct the vote: -0-
                     (ii) Shared power to vote or direct the vote: -0-
                    (iii) Sole power to dispose or direct the disposition: -0-
                     (iv) Shared power to dispose or direct the disposition: -0-




CUSIP No. 897051108                13G/A                    PAGE 12 of 17 PAGES


         G.   Philip J. Hempleman
                  (a) Amount beneficially owned: 1,170,000
                  (b) Percent of class: 6.31%
                  (c) (i) Sole Power to vote or direct the vote: -0-
                     (ii) Shared power to vote or direct the vote: 1,170,000
                    (iii) Sole power to dispose or direct the disposition: -0-
                     (iv) Shared power to dispose or direct the disposition:
                          1,170,000


ITEM 5.   OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.
      If this statement is being filed to report the fact that as of the date
      hereof the reporting person has ceased to be the beneficial owner of more
      than five percent of the class of securities, check the following |X|.

       Ardsley Advisory Partners and Ardsley Partners I have disposed of any
Common Stock directly owned by AP II, Ardsley Institutional, Ardsley Energy,
Ardsley Offshore and any managed accounts. Mr. Hempleman, as described further
in Item 6 may continue to be deemed to be an indirect "beneficial owner" of the
shares of Common Stock.

ITEM 6.   OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.

         Mr. Hempleman directs the operations of certain managed accounts and
therefore may be deemed to be the indirect "beneficial owner" of the shares of
Common Stock owned by the managed accounts.

ITEM 7.   IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED
          THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY.
          Not applicable.

ITEM 8.   IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.
          Not applicable.

ITEM 9.   NOTICE OF DISSOLUTION OF GROUP.
          Not applicable.




CUSIP No. 897051108                 13G/A                    PAGE 13 of 17 PAGES

ITEM 10.  CERTIFICATION.

     Each of the Reporting Persons hereby makes the following certification:

          By signing below I certify, to the best of my knowledge and belief,
the securities referred to above were acquired in the ordinary course of
business, were not acquired for the purpose of and do not have the effect of
changing or influencing the control of the issuer of such securities and were
not acquired in connection with or as a participant in any transaction having
such purposes or effect.





CUSIP No. 897051108                 13G/A                    PAGE 14 of 17 PAGES

                                    SIGNATURE

          After reasonable inquiry and to the best of their knowledge and
belief, the undersigned certify that the information set forth in this statement
is true, complete and correct.


DATED:   as of February 13, 2009


                                  ARDSLEY PARTNERS FUND II, L.P.
                                  BY:  ARDSLEY PARTNERS I,
                                       GENERAL PARTNER


                                  BY: /s/ Steve Napoli
                                      ----------------------------
                                      Steve Napoli
                                      General Partner



                                  ARDSLEY PARTNERS INSTITUTIONAL FUND, L.P.
                                  BY:  ARDSLEY PARTNERS I,
                                       GENERAL PARTNER


                                  BY: /s/ Steve Napoli
                                      ----------------------------
                                      Steve Napoli
                                      General Partner


                                  ARDSLEY RENEWABLE ENERGY OFFSHORE FUND, LTD.


                                  BY: /s/ Steve Napoli
                                      ----------------------------
                                      Steve Napoli
                                      Director

                                  ARDSLEY OFFSHORE FUND LTD.


                                  BY: /s/ Steve Napoli
                                      ----------------------------
                                      Steve Napoli
                                      Director

                                  ARDSLEY ADVISORY PARTNERS
                                  By:  ARDSLEY PARTNERS I
                                       GENERAL PARTNER


                                  BY: /s/ Steve Napoli
                                      ----------------------------
                                      Steve Napoli
                                      General Partner




CUSIP No. 897051108                 13G/A                    PAGE 15 of 17 PAGES

                                  ARDSLEY PARTNERS I

                                  BY: /s/ Steve Napoli
                                      ----------------------------
                                      Steve Napoli
                                      General Partner



                                  PHILIP J. HEMPLEMAN, INDIVIDUALLY


                                  BY: /s/ Steve Napoli*
                                      ----------------------------
                                      Steve Napoli
                                  As attorney in fact for
                                  Philip J. Hempleman


*    Evidence of Power of Attorney was filed with the Schedule 13G/A filed on
     February 15, 2006 (Acc-no: 0000902664-06-000895) and is incorporated by
     reference into this filing.



CUSIP No. 897051108                 13G/A                    PAGE 16 of 17 PAGES


                                    EXHIBIT 1
               JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k)(1)

                  The undersigned acknowledge and agree that the foregoing
statement on Schedule 13G is filed on behalf of each of the undersigned and that
all subsequent amendments to this statement shall be filed on behalf of each of
the undersigned without the necessity of filing additional joint filing
statements. The undersigned acknowledge that each shall be responsible for the
timely filing of such amendments, and for the completeness and accuracy of the
information concerning him, her or it contained herein, but shall not be
responsible for the completeness and accuracy of the information concerning the
other entities or persons, except to the extent that he, she or it knows or has
reason to believe that such information is inaccurate.

Dated as of February 13, 2009



                                  ARDSLEY PARTNERS FUND II, L.P.
                                  BY:  ARDSLEY PARTNERS I,
                                       GENERAL PARTNER


                                  BY: /s/ Steve Napoli
                                      ----------------------------
                                      Steve Napoli
                                      General Partner



                                  ARDSLEY PARTNERS INSTITUTIONAL FUND, L.P.
                                  BY:  ARDSLEY PARTNERS I,
                                       GENERAL PARTNER


                                  BY: /s/ Steve Napoli
                                      ----------------------------
                                      Steve Napoli
                                      General Partner


                                  ARDSLEY RENEWABLE ENERGY OFFSHORE FUND, LTD.


                                  BY: /s/ Steve Napoli
                                      ----------------------------
                                      Steve Napoli
                                      Director

                                  ARDSLEY OFFSHORE FUND LTD.


                                  BY: /s/ Steve Napoli
                                      ----------------------------
                                      Steve Napoli
                                      Director




CUSIP No. 897051108                 13G/A                    PAGE 17 of 17 PAGES

                                  ARDSLEY ADVISORY PARTNERS

                                  By:  ARDSLEY PARTNERS I
                                       GENERAL PARTNER

                                  BY: /s/ Steve Napoli
                                      ----------------------------
                                      Steve Napoli
                                      General Partner


                                  ARDSLEY PARTNERS I

                                  BY: /s/ Steve Napoli
                                      ----------------------------
                                      Steve Napoli
                                      General Partner


                                  PHILIP J. HEMPLEMAN, INDIVIDUALLY


                                  BY: /s/ Steve Napoli*
                                      ----------------------------
                                      Steve Napoli
                                  As attorney in fact for
                                  Philip J. Hempleman




*    Evidence of Power of Attorney was filed with the Schedule 13G/A filed on
     February 15, 2006 (Acc-no: 0000902664-06-000895) and is incorporated by
     reference into this filing.